Self-balancing gyrating machine.



No. 798,015. PATENTED AUG',22, 1905. G. W. & F. D. COMES.

SELF BALANCING GYRATENG MACHINE.

APPLICATION FILED JUNE 13.1904.

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PATENTED AUG. 22, 1905.

G. W. & F. D. GOMBS. SELF BALANCING GYRATING MACHINE;

APPLIOATION FILED JUNE 13.1904- IJ' @(zwasea:

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UNITED STATES PATENT CFFIQE.

GEORGE W. COMBS AND FREDERICK D. COMBS, OF LEAVENWORTH,

KANSAS.

SELF-BALANCING: GYRATING MACHINE.

To all whont it may concern.-

Be itknown that we, GEORGE W. CoMBs and FREDERICK D. CoMBs, citizens of the United States, residing at Leavenworth, in the county of Leavenworth and State of Kansas, have invented certain new and useful Improvements in Self Balancing Gyrating Machines, of which the following is a specification.

Our invention relates to improvements in self-balancing gyrating machines; and it consists more particularly of simple and inexpensive means for driving and balancing sieve-boxes for bolting or sifting machines and other machines having a gyrating motion.

In the usual construction of machines of this character it is customary to rigidly unite two sieve-boxes and drive them with a centrally-disposed shaft having two cranks extending in the same direction. This construction throws all theweight of the boxes on one side of the shaft, necessitating the use of heavy counterbalance Weights, large bearings, and a heavy cast-iron frame to maintain the shaft in a perpendicular position and support the heavy weights. The objections to this construction are the expense of the weights and the heavy frame and the cost of maintenance. Furthermore, the resilient rods carrying the sieve-boxes swing together in the same direction. Consequently when the machine is in motion it will vibrate the building in which it is located and require more power for its operation.

WVe overcome the above-mentioned objections by employing four sieve-boxes, connected in diagonal pairs by diagonally-arranged bridge-trees, and driving said boxes with a centrally disposed suspended shaft having two like sets of oppositely-extending cranks journaled in central bearings on the bridge trees. With this construction the sieve-boxes balance each other and the shaft, so the latter will not require a heavy supporting-frame and balance-weights, and the operation of the machine will be unattended by vibration, because the resilient rods supporting one pair of boxes swing in an opposite direction from those supporting the other pair of boxes. Consequently all tendency of the latter to vibrate the building will be counteracted by the former.

In order that the invention may be readily understood, reference will now be made to the accompanying drawings, in which- Specification of Letters Patent.

Application filed June 13, 1904. Serial No. 212,281.

Patented Aug. 22, 1905.

Figure 1 represents a plan view, partly in section, of our improved machine, taken on line I I of Fig. 2. Fig. 2 is a vertical central section of the same, taken on line II II of Fig. 1. Figs. 3 andd are detail plan views showing the manner in which the sieve-boxes are connected in pairs.

In the present construction we employ four sieve-boxes l 2, arranged perpendicularly and connected in diagonal pairs near their opposite ends by diagonally-arranged bridgetrees '3 and 4:, respectively. The bridge-trees terminate at their opposite ends in right-angular flanges 5, secured by bolts 6 to the corners of the sieve-boxes, as shown in Figs. 3 and 1, and have centrally-disposed bearings 7, provided with vertically-arranged antifriction-rollers 8, supported by underline flanges 9, formed integral with the lower sides of the bearings.

10 designates a pair of brackets secured to the central portion of the outer corners of the sieve-boxes diagonally opposite the corners to which the bridge-trees are secured, and 11 designates a similar pair of brackets secured in a like manner to the outer corners of sieveboxes 2.

13 designates hangers secured to ceiling I L.

15 designates a plurality of resilient rods secured at their opposite ends to brackets 10 11 and the hangers 13 in order to support the sieve-boxes.

16 designates a centrally -disposed main shaft having two like sets of oppositely-disposed cranks 17 1'8, journaled in bearings 7 and connected at its upper end by a universal joint 19 to a short section of shafting 20, con nected at its upper end by a universal joint 21 .to a short section of shafting 22, journaled in the bearings 23 2 1 of hanger 25, secured to the bearing by bolts 26. The drive-shaft 22 is suspended from a cap 27, secured to its upper end by a set-screw 28, and in order to avoid all unnecessary friction antifrictionballs 29 are interposed between the cap and the upper side of bearing 24.

30 designates a drive-pulley rigidly mounted on shaft 22 between bearings 23 24:, thereby affording resistance to the tension of the driving-belt.

All tendency of the shaft 16 to gyrate is overcome by a contractile spring 31, secured at its opposite ends to an eye 32 in the end of the lower crank 18, and a ball 33 in a socket by extending shaft 16 up into the bearings of' hanger 25; but it 'is preferable 'to use these parts, as it permits the main shaft and sieveboxes to automatically assume a centralposition between hangers 13 ini'case care is not exercised in placing the latter an equal distance from the center of the bearings of hanger 25.

While we have shown the main shaft arranged to be driven from above, it can of course be extended through floor 35 of the building and driven by a pulley mounted upon its lower end when desired.

Although we have shown four sieve-boxes, six or eight may be employed, and we of course reserve the right to make such other changes as properly fall within the scope of the appended claims.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is

1. A gyrating machine consisting of a plurality of sieve-boxes,independent bridge-trees connecting the boxes in diagonal pairs and provided with centrally -disposed bearings, and a centrally-arranged shaft having for each pair oppositely-disposed cranks journaled in the bearings.

2. A gyrating machine consisting of a plurality of vertically-arranged sieve-boxes, diagonally-extending independent bridge-trees connecting the boxes in diagonal pairs and provided with centrally-disposed bearings, and a centrally-arranged vertical shaft having for each pair of boxes oppositely-disposed cranks journaled in the bearings.

3. A gyrating machine consisting of a plurality of sieve-boxes, bridge-trees connecting the boxes in diagonal pairs and provided with centrally-disposed bearings, a centrally-arranged shaft having oppositely disposed cranks journaled in the bearings, a hanger having two bearings in which the upper portion of the shaft is journaled, a cap secured to the upper end of the shaft, antifriction-balls interposed between the cap and the adjacent bearing of the hanger, and means for rotating the shaft from a point betweenthe bearings.

4. A gyrating machine consisting of a plurality of sieve-boxes, bridge-trees connecting the boxes in diagonal pairs and provided with centrally-disposed bearings, a centrally-arranged vertical main shaft having oppositelydisposed cranks journaled in the bearings, a hanger having two bearings, a drive-shaft journaled therein, a short section of shafting arranged between the main and the driving shafts, and universal joints connecting the adjacent ends of the shafting.

5. A gyrating machine consisting of four boxes, bridge-trees arranged in duplicate pairs extending at right angles to each other and connecting the boxes in diagonal pairs, centrally-disposed bearings formed integral with the bridge-trees, and a centrally-arranged shaft having two like sets of oppositely-disposed cranks journaled in the bearings.

6. A gyrating machine consisting of a plurality of sieve-boxes, diagonally-extending bridge-trees connecting the boxes in diagonal pairs and provided with centrally-disposed bearings, a centrally-arranged shaft having oppositely-disposed cranks journaled in the bearings, and means for preventing the shaft from gyrating consisting of a member connected by universal joints with one extreme crank of the shaft and a stationary object.

7. A gyrating machine consisting of a plurality of sieve boxes, diagonally extending bridge-trees connecting the boxes in diagonal pairs and provided with centrally-disposed bearings, a centrally-arranged shaft having oppositely-disposed cranks journaled in the bearings, a spring, and universal connections at its opposite ends to a stationary object and the end of the lower crank on the shaft to prevent the latter from gyrating.

In testimony whereof we affix our signatures in the presence of two witnesses.

GEORGE w. COMBS. FREDERICK 1). comes.

Witnesses:

N. S. CoMBs, NINA GoMBs. 

